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package com.treepoke.util.zip.zipframework;

import java.awt.geom.Path2D;
import java.io.*;
import java.nio.ByteBuffer;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.*;

/**
 *
 * @author Neill Harper
 */
public class FileData extends ZIPObject {

    private File tempFile;
    private FileEntry parent;
    private CRC32 crc32;
    private int[] crcNums = {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
        0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
        0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
        0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
        0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
        0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
        0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
        0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
        0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
        0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
        0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
        0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
        0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
        0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
        0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
        0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
        0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
        0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
        0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
        0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
        0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
        0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
        0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
        0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
        0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
        0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
        0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
        0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
        0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
        0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
        0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
        0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
        0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
        0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
        0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
        0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
        0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
        0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
        0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
        0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
        0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
        0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
        0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
        0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
        0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
        0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
        0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
        0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
        0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
        0x2d02ef8d
    };

    public FileData(FileEntry Parent) throws IOException {
        parent = Parent;
        tempFile = File.createTempFile("zip", null);
        this.fillTempFile();

    }

    @Override
    protected byte[] GetOutput() {
        FileInputStream output = null;
        byte[] outBytes = new byte[(int) tempFile.length()];
        try {
            output = new FileInputStream(tempFile);

            
                output.read(outBytes, 0, outBytes.length);
            
                
            

            return outBytes;
        } catch (FileNotFoundException ex) {
            Logger.getLogger(FileData.class.getName()).log(Level.SEVERE, null, ex);
        } 
        catch(IOException ioE)
        {
            Logger.getLogger(FileData.class.getName()).log(Level.SEVERE, null, ioE);
        }
        finally {
            try {
                output.close();
            } catch (IOException ex) {
                Logger.getLogger(FileData.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return outBytes;
    }

    private void fillTempFile() throws FileNotFoundException, IOException {
        switch (parent.getLfh().getMethod().getMethodValue()) {
            case Method.Stored:
                storedCompression();
                break;
            case Method.Deflated:
                deflateCompression();
                break;
            default:
                throw new UnsupportedOperationException("Not supported yet.");
               

                
                }
        
        if (this.parent.getPassword() != null) {
                    EncryptFileData();


                
        }
        this.parent.getLfh().setCompressedSize((int) tempFile.length());

    }
    
    private void EncryptFileData() throws UnsupportedEncodingException, IOException
        {
            String password = this.parent.getPassword();
            int[] keys = new int[3];
            Random ran = new Random();
            keys[0] = 305419896;
            keys[1] = 591751049;
            keys[2] = 878082192;

            
            byte[] passwordBytes = password.getBytes("US-ASCII");

            for (byte b : passwordBytes)
            {
                updateKeys(keys, b);
            }

            byte[] sbytes = new byte[12];

            byte[] encBuf = new byte[12];

            //encBuf = ConvertsByteArrayToByteArray(sbytes, sbytes.Length);

            ran.nextBytes(encBuf);
            
                     
            
            encBuf[11] = (byte)(this.parent.getLfh().getLastModDataTime().getDosTime() >>8);

            for (int i = 0; i < encBuf.length;i++ )
            {
                encBuf[i] = EncodeByte(keys,encBuf[i]);
            }

            File newTemp = File.createTempFile("zip", null);
            FileOutputStream newTempStream = new FileOutputStream(newTemp);
            BufferedOutputStream bos = new BufferedOutputStream(newTempStream, 2048);

            //Write the encryption header to the new temp file
            newTempStream.write(encBuf, 0, encBuf.length);

            FileInputStream input = null;
            FileChannel fc;  

            try
            {
                input = new FileInputStream(tempFile);
                fc = input.getChannel();
                MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY,0,fc.size());
                
                
                int i;
                byte b;
                long bytecount = 0;
               
                while (bb.hasRemaining())
                {
                   
                    bos.write(EncodeByte(keys, bb.get()));
                    bytecount ++;
                }
            }
            finally
            {
                input.close();
                bos.close();
            }

            tempFile.delete();

            tempFile = newTemp;

        }
    
    private byte EncodeByte(int[] keys, byte b)
        {
            byte t = DecryptByte(keys);
            updateKeys(keys, b);
            return (byte)(t ^ b);
        }
    
    private byte DecryptByte(int[] keys)
        {
            short temp = (short)(keys[2] | 2);
            return (byte)((temp * (temp ^ 1)) >> 8);
        }
    
    
    
    private int crc32Method(int CRC, byte b)
        {
        int i = b & 0xFF;     
        
        long l = (long)CRC & 0xFFFFFFFFL;
        
        
        long crcnum, crcin;
        
        int tempcrc = crcNums[(i ^ (int)(l)) & 0xff];
        
        long holdRes = tempcrc ^ (l >> 8);
        
        
        
               
        int ret = (int)(holdRes & 0xFFFFFFFFL);
        
        
            return ret;
        }
    
    

    private void updateKeys(int[] keys, byte b)
        {
            keys[0] = crc32Method(keys[0], b);
            keys[1] += keys[0] & 0xFF;
            
            keys[1] = ((keys[1] * 134775813 + 1));
            
            keys[2] = crc32Method(keys[2], (byte)(keys[1] >> 24));
    }
    
    private void storedCompression() throws FileNotFoundException, IOException
        {

            FileInputStream input = null;
            FileOutputStream output = null;
            try
            {
                crc32 = new CRC32();
                input = new FileInputStream(this.parent.getFilePath());
                
                output = new FileOutputStream(tempFile);
                

                byte[] inBytes = new byte[1024];
                int offset = 0;
                int numberRead = 0;
                while ((numberRead = input.read(inBytes, 0, 1024)) != -1)
                {
                    crc32.update(inBytes, 0,numberRead);
                    
                    output.write(inBytes, 0, numberRead);

                    offset += numberRead;
                }

                long c32 = crc32.getValue();
                this.parent.getLfh().setCRC32((int)crc32.getValue());

            }
            finally
            {

                input.close();
                output.close();
            }
        }
    
    private void deflateCompression() throws FileNotFoundException, IOException
        {
            FileInputStream input = null;
            FileOutputStream output = null;
            DeflaterOutputStream dos = null;
            
             
                   
            try
            {
                crc32 = new CRC32();
                input = new FileInputStream(this.parent.getFilePath());
                               
                output = new FileOutputStream(tempFile);
                Deflater d = new Deflater(Deflater.BEST_COMPRESSION,true);
                dos = new DeflaterOutputStream(output,d);
                

                byte[] inBytes = new byte[1024];
                int offset = 0;
                int numberRead = 0;
                while ((numberRead = input.read(inBytes, 0, 1024)) != -1)
                {
                    crc32.update(inBytes, 0,numberRead);
                    
                    dos.write(inBytes, 0, numberRead);

                    offset += numberRead;
                }

                long c32 = crc32.getValue();
                this.parent.getLfh().setCRC32((int)crc32.getValue());

            }
            finally
            {

                input.close();
                dos.close();
            }

            

        }

}
